selftests: x86/pkeys: fix spelling mistake: "itertation" -> "iteration"

Fix spelling mistake in print test pass message.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>

tools/testing/selftests/x86/protection_keys.c

@@ -1367,7 +1367,7 @@ void run_tests_once(void)
 		tracing_off();
 		close_test_fds();
 
-		printf("test %2d PASSED (itertation %d)\n", test_nr, iteration_nr);
+		printf("test %2d PASSED (iteration %d)\n", test_nr, iteration_nr);
 		dprintf1("======================\n\n");
 	}
 	iteration_nr++;